github.com/kaydxh/golang@v0.0.131/pkg/monitor/opentelemetry/tracer/tracer.go (about)

     1  /*
     2   *Copyright (c) 2022, kaydxh
     3   *
     4   *Permission is hereby granted, free of charge, to any person obtaining a copy
     5   *of this software and associated documentation files (the "Software"), to deal
     6   *in the Software without restriction, including without limitation the rights
     7   *to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     8   *copies of the Software, and to permit persons to whom the Software is
     9   *furnished to do so, subject to the following conditions:
    10   *
    11   *The above copyright notice and this permission notice shall be included in all
    12   *copies or substantial portions of the Software.
    13   *
    14   *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    15   *IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    16   *FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    17   *AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    18   *LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    19   *OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    20   *SOFTWARE.
    21   */
    22  package tracer
    23  
    24  import (
    25  	"context"
    26  	"fmt"
    27  
    28  	"go.opentelemetry.io/otel"
    29  	"go.opentelemetry.io/otel/sdk/resource"
    30  	sdktrace "go.opentelemetry.io/otel/sdk/trace"
    31  	semconv "go.opentelemetry.io/otel/semconv/v1.10.0"
    32  )
    33  
    34  type TracerOptions struct {
    35  	builer TracerExporterBuilder
    36  }
    37  
    38  type Tracer struct {
    39  	opts TracerOptions
    40  }
    41  
    42  func NewTracer(opts ...TracerOption) *Tracer {
    43  	t := &Tracer{}
    44  	t.ApplyOptions(opts...)
    45  
    46  	return t
    47  }
    48  
    49  //https://github.com/open-telemetry/opentelemetry-go/blob/main/example/jaeger/main.go
    50  func (t *Tracer) Install(ctx context.Context) (err error) {
    51  	exp, err := t.createExporter(ctx)
    52  	if err != nil {
    53  		return err
    54  	}
    55  
    56  	tp := sdktrace.NewTracerProvider(
    57  		// Always be sure to batch in production.
    58  		sdktrace.WithBatcher(exp),
    59  		// Record information about this application in a Resource.
    60  		sdktrace.WithResource(resource.NewWithAttributes(
    61  			semconv.SchemaURL,
    62  		)),
    63  	)
    64  
    65  	// Register our TracerProvider as the global so any imported
    66  	// instrumentation in the future will default to using it.
    67  	otel.SetTracerProvider(tp)
    68  
    69  	return nil
    70  }
    71  
    72  func (t *Tracer) createExporter(ctx context.Context) (sdktrace.SpanExporter, error) {
    73  	if t.opts.builer == nil {
    74  		return nil, fmt.Errorf("trace exporter builder is nil")
    75  	}
    76  
    77  	return t.opts.builer.Build(ctx)
    78  }